Hair cell loss is main cause of SNHD Sufficient neural element survives for auditory cortex stimulation

1. COCHLEAR IMPLANT
Dr surbhi
Patna medical college

2. Hair cell loss is main cause of SNHD
Sufficient neural element survives for auditory
cortex stimulation

3. defination

6. • Single electrode implant was developed in 1972
• Prof kurt burian implanted 1st multichannel
implant in 1977
• Australian cochlear implant was approved for
adult in 1989 by FDA
• 1990 FDA approved age for 2yr and above
• in 2002 for 1yr and up was approved by FDA
• 2005 1st three recepients were implanted with
TIKI device in melbourne

7. Component of cochlear implant

11. FUNCTIONING OF IMPLANT

12. Rate of stimulation
• no. of electrical pulses per sec that may be
delivered to an individual electrode contact
• Higher rates:
• Improve representation of temporal
information
• Finer amplitude variations
• Greater control of rate and population of
nerve excited

14. advantages of using two ci

15. Hybrid ci

18. • Realistic experiance
• Good family and social support
• Adequate cognitive function

21. outcome
• Previous auditory experiance
• Implantation at younger age
• Shorter duration of deafness
• Neural plasticity

22. Pre op evaluation
• Medical
• Vaccination
• Imaging
• Audiological evaluation
• Hearing aid trial
• Speech and lauguage
• Psychological evalution

23. Surgical steps

33. Post op mapping and habilitation

35. Late complications
• Exposure and extrusion of device
• Pain
• Migration or displacement
• Otitis media

36. conclusion
• Proven effective treatment for SNHL
• All diagnosed with SNHL must be referred
• Results not good in older children but
assessment by implant centre is worth while
Studies have confirmed cost effectiveness

37. Thank you